b Since April 1995, the
National Transportation Safety Board has been required by law to investigate
all public-use accidents, increasing the number of NTSB reported general
aviation accidents by approximately 1.75%.

c Rates are computed by
dividing the number of fatalities, serious injuries, total accidents, and
fatal accidents by the number of flight hours. Except for the exclusions
mentioned in footnote a.

d Data for 1960, 1965, and 1970 include air taxi.

NOTES

Flight hours are estimated by the U.S. Department of
Transportation, Federal Aviation Administration.